What is ice pigging?
Ice pigging is a cleaning method for potable water distribution pipelines. The method involves pumping a slurry of ice into water pipes through a hydrant. Once in the pipes, system pressure is used to push the ice slurry downstream to exit through a different hydrant.

The ice slurry cleans material on the bottoms and sides of pipes using forces up to 1,000 times greater than flushing with water alone. Ice pigging results in more effective cleaning and uses significantly less water than traditional flushing methods. Like a glacier, the ice slurry incorporates the material and biofilm on the pipe into the ice mixture rather than bulldozing it.

Show All Answers

1. What is ice pigging?
2. What is in the ice pig slurry? Is it safe?
3. Do other water authorities use ice pigging?
4. Why is ACWWA ice pigging instead of flushing?
5. Does ACWWA need access to my service line?
6. Is ACWWA digging up any pipelines?
7. How many feet of pipe is ACWWA ice pigging?
8. When is ACWWA performing the ice pigging?
9. How will I be notified that the ice pigging is being done on my section of the water pipeline?
10. Will the crews be working at night or on the weekends?
11. How noisy are the machines?
12. What should I do to prepare for my ice pigging day?
13. Can I use my water during the ice pigging process?
14. How long will I be without water?
15. Is the water from my tap safe to drink during the ice pigging procedure?
16. What happens if I turn on my water while ACWWA is ice pigging?
17. Do I have to do anything special after the ice pigging procedure is complete?
18. Is my water safe to drink when the procedure is complete?
19. How often will ACWWA be using this technique?
20. What if my water is discolored after ice pigging?
21. What should I do if my water is discolored?
22. Does this process have anything to do with changing my water supply like they did in Flint?
23. Why isn’t my area using ice pigging?
24. Will I get charged any more on my bill because you are doing this?
25. Will I need to change the water filter(s) on my ice maker, refrigerator, and tap?
26. Who can I contact if I have additional questions?